[root@node1 ~]# hb_gui
Traceback (most recent call last):
File "/usr/bin/hb_gui", line 41, in ?
import gtk, gtk.glade, gobject
File "/usr/lib64/python2.4/site-packages/gtk-2.0/gtk/__init__.py", line 76, in ?
_init()
File "/usr/lib64/python2.4/site-packages/gtk-2.0/gtk/__init__.py", line 64, in _init
_gtk.init_check()
RuntimeError: could not open display